PHP libxml_set_external_entity_loader() Function
Example
Change the default external entity loader:
<?php
$xml = <<<XML
<!DOCTYPE foo PUBLIC "-//FOO/BAR" "http://example.com/foobar">
<foo>bar</foo>
XML;
$dtd = <<<DTD
<!ELEMENT foo (#PCDATA)>
DTD;
libxml_set_external_entity_loader(
function ($public,
$system, $context) use($dtd) {
var_dump($public);
var_dump($system);
var_dump($context);
$f = fopen("php://temp", "r+");
fwrite($f, $dtd);
rewind($f);
return $f;
}
);
$dd =
new DOMDocument;
$r = $dd->loadXML($xml);
var_dump($dd->validate());
?>
Definition and Usage
The libxml_set_external_entity_loader() function changes the default external entity loader.
Syntax
libxml_set_external_entity_loader(function)
Parameter Values
| Parameter | Description |
|---|---|
| function | Required. A function that takes three arguments. Two strings, a public id and system id, and a context (an array with four keys) as the third argument. This callback should return a resource, a string from which a resource can be opened, or NULL. |
Technical Details
| Return Value: | Returns TRUE on success, FALSE on failure |
|---|---|
| PHP Version: | 5.4+ |
❮ PHP libxml Reference
